shell:$ nslookup -timeout=2 -retry=1 'cdn.polyfill.us'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
cdn.polyfill.us	canonical name = pltraffic35.com.
Name:	pltraffic35.com
Address: 172.237.146.25
Name:	pltraffic35.com
Address: 172.233.219.49
Name:	pltraffic35.com
Address: 172.237.146.38
Name:	pltraffic35.com
Address: 172.237.146.8
Name:	pltraffic35.com
Address: 172.233.219.123
Name:	pltraffic35.com
Address: 172.233.219.78